The Charging Equipment consists of storage bins and tubes for controlled charging of raw material mix into the furnace process.
This furnace has 10 charging positions, 3 per electrode, total 9 peripheral, and 1 in centre. Each position has a separate furnace bin and tube. The charging tubes are rotating in order to obtain a good distribution of charge mix around the electrodes, thus reducing the requirement of stoking.
Correction material is charged through the same system by means of a by-pass channel in each peripheral furnace bin.
The 10 furnace bins are placed in two rows, 5 bins on each side of the furnace, on the electrode floor. The furnace bin for the centre tube is larger since 25-30% of the total furnace consumption is passing through the centre tube. The centre bin has no by-pass channel since corrections are performed on the peripheral charging positions only. Each bin for the peripheral charging tubes has a by-pass channel with a separate inlet. This allows for quick charging of correction material to the desired electrode(s) since the bin design will prioritize material feeding from by-pass channel.
The vibration feeders transport material from the furnace bin outlet into the rotating charging tube, one feeder for each bin/tube. The vibrating feeder chassis is powered by two unbalance vibration motors. The vibration feeder is supported on damping spiral springs, which form a flexible transition to a fixed support structure. The weight of the vibration feeder has been accurately balanced with the vibration motors to give optimum transport and lifetime.